#16 EventBundle participation (fix errors and improve ux)

src/Bundle/ChillEventBundle/Form/Type/PickEventType.php

@@ -151,7 +151,7 @@ class PickEventType extends AbstractType
         } else {
             $centers = $this->authorizationHelper->getReachableCenters(
                 $this->user,
-                (string) $options['role']
+                (string) $options['role']->getRole()
             );
         }